Improvement in steam-generators



nitrll tatr @wat demic.'

JOHN LOADER AND WILLIAM HENRY OHILDfoF LONDON, ENGLAND, AssIeNoRs FORONE-THIRD THEIR RIGHT 'ro AARON WHITE oooK WILLIAMS, or sAMn PLAGE.

Letters Patent No.103,902, dated .Time 7, 1870.

IMPROVEMENT IN' STEAM-GENERATORS.

The Schedule referred to in these Letters Patent and making part of thesaune.

We, JOHN LOADER and WILLLAM HENRY CHILD, both of London, England, haveinvented certain Improvements in Steam-Boilers, of which the` followingis a specification. v

lhe invention has for its object the construction of .a steam-boiler,wherein steam may be more rapidly generated, and a more thoroughcirculation of the water maintained than has heretofore beenpracticable.

For this purpose, .we place in the interior of the boiler hollowdisplacers, that is to say, hollow bodies, which occupyalarge portionofthe space and leave comparatively thin water-spaces.

Around the said displacers we place tubes, or, in-V Description of theDrawing.

Figure 1 is a vertical section of an upright boiler, constructedaccording to.our invention. Y

Figure 2 is a horizontal section on the line 211x, tig. 1.

Like letters indicate the same parts in both ofthe figures.

A is a central steam-generating vessel.

B B are smaller vessels or tubes, which are connected with thefsaidcentral vessel.

The displacer a is preferably made of boiler-plate or wrought-irontubing, but it may be made of any suitable material.

lhe provisions for promoting circulation are carried on the displacers,and are raised and lowered therewith by means Qt' the screws and nutsrepresented in the tops of the several sections, `A and B, of theboiler. There is a jacket, al, of thin metal, held at a little distancefrom each displacer by stays a2, as repre- .sented-f and the spaces thuscut oli` or separated from the general contents of the boiler, by beingincloscd between the displacers andthe respective jackets, are open atthe top-and bottom, as shown.

When a displacer is lowered into the water, the circulating-jacket islowered with it, and a provision is thus madeffor the constant descentof a currentof the water, which has been dragged upward by the steam.

When a displacer is taken out for any purpose, the correspondingcirculator comes with it, and maybe afterward detached, exchanged,cleaned, altered, and adjusted at will, ready'to be again inserted withthe displacer.

In applying our invention to an upright boiler, we

prefer that the'same should be as shown in the drawing, that is to say,it should consist ot a series ot'steamgenerating vessels, the centralone being the largest, and surrounded by a number otsmallervessels, allot which, at their lower ends, communicate with' each other, or with awater-space surrounding a central lire-box c, while at Ltheir` upperends the .steam-spaces of all the boilers are connected together throughthe short `connecting-pieces d, which also serve to secure the vesselstogether. A

To allow these connections fl to be readily inserted' or removed, weform an aperture ou the other side of the vessel, which aperture isclosed by a screw-plug, d'2

A B are the coversor top of the sections of the boiler'. They may beretained in the manner shown,

or in any other ordinary or suitable manner, butgwe esteem itimportantthat they be readily removable, to allow the removal of the displacers,when desired, and prefer the construction shown.

The boiler is provided with afeed and blow-Oil0 pipe, g, and steam-pipeh, in the usual manner.

The steam-generating vessels are incloscd within a case or cover, e, ofsheet-iron or other suitable material. The furnace-door is attached tothis cover.

The said invention, wit-h very slight modifications,

is also applicable to various forms and descriptions of boilers besides'that which we have shown in the drawing, as will be're'aidilyunderstood by persons i skilled in the manufacture of steam-boilers.

' We are aware that it has previously been proposed to employdi'splacers, analogous to those hereinedescribed.

We do not claim such displacersas new in themselves; but r We clairnone4or more adjustable displacers, constructed substantially as described,and arranged within a boiler, in combination with circulators alattached thereto, so as to be introduced and removed there- --with,substantially as Vand for the purposes herein set forth.

JOHN LOADER. [L. s.] WILLIAM H ENRY CHILD. [L. s.]

Witnesses:

H. I. Genen, J. W. WYNN,

24 Royal Excumge.

